Washing and Heat Treatment of Aluminum-Based Drinking Water Treatment Residuals to Optimize Phosphorus Sorption and Nitrogen Leaching: Considerations for Lake Restoration

Drinking water treatment residuals (DWTRs) generated during drinking water treatment have been proposed for use in lake restoration as a solid-phase sorbent to inactivate phosphorus (P) in lake sediment. However, treatments that minimize leaching of nitrogen (N) and optimize P sorption capacity may...

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Bibliographic Details
Published in:Water (Basel) 2021-09, Vol.13 (18), p.2465
Main Authors: Kuster, Anthony C., Huser, Brian J., Padungthon, Surapol, Junggoth, Rittirong, Kuster, Anootnara T.
Format: Article
Language:English
Subjects:
Acids
Adsorption
Affinity
Aluminum
Chemical properties
Deionization
Drinking water
Environmental cleanup
Eutrophication
Heat treatment
Heat treatments
High temperature
Lake restoration
Lake sediments
Lakes
Leaching
Metals
Methods
Nitrates
Nitrogen
Oxalic acid
Phosphorus
Scanning electron microscopy
Sedimentation & deposition
Sediments
Solid phases
Sorbents
Sorption
Vattenbehandling
Water Treatment
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Summary:Drinking water treatment residuals (DWTRs) generated during drinking water treatment have been proposed for use in lake restoration as a solid-phase sorbent to inactivate phosphorus (P) in lake sediment. However, treatments that minimize leaching of nitrogen (N) and optimize P sorption capacity may be necessary prior to use. This study assessed seven different treatment methods, including washing and heat treatments at different temperatures and with and without oxygen limitation, among two DWTRs from Thailand. Results showed that oxygen-limited heat treatment at 600 °C substantially reduced N leaching (
ISSN:2073-4441
2073-4441
DOI:10.3390/w13182465